Your product image as shown in the screenshot has different dimensions. You should set the Single Product Image sizes to 225px and then regenerate the thumbnails using this plugin:
http://wordpress.org/extend/plugins/regenerate-thumbnails/
Your product image as shown in the screenshot has different dimensions. You should set the Single Product Image sizes to 225px and then regenerate the thumbnails using this plugin:
http://wordpress.org/extend/plugins/regenerate-thumbnails/